It is surprising how much alike the two bikes are. Craig has said often he builds them to "feel" alike and he does. I'm enjoying the Fly very much. My Luna has been "down" for a little while. I changed the fork and the crown race had to be replaced...none in Pittsburgh...came in...mechanic home for the holidays...etc. Because of that I haven't compared them as closely as later.
If I remember correctly you know about Tufo Tubulars. Which models have you heard as the best of various "worlds." Believe it or not I'm having a tubular wheelset built.
I hope you had a Happy Thanksgiving.
P.S. With the cutout in the lug I would guess the new Fly lug is a little lighter. I'd guess he wanted to distinquish the "look" from a Luna. It is a long story but right now I don't have a Fly decal. It would be hard to tell the difference just looking.